Goodwill and Other Intangible Assets

12 Months Ended

Dec. 28, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

Goodwill and Other Intangible Assets

The changes in the carrying amounts of goodwill by segment were as follows:

(In thousands)	Domestic		International			Total
Balance at the end of 2017	$	782,664	$	70,341		$	853,005
Foreign currency translation adjustment and other	—		(5,461		)	(5,461		)
Balance at the end of 2018	782,664		64,880			847,544
Goodwill recorded in connection with the AbleVets acquisition	37,071		—			37,071
Foreign currency translation adjustment and other	—		(1,457		)	(1,457		)
Balance at the end of 2019	$	819,735	$	63,423		$	883,158

A summary of net intangible assets is as follows:

	2019				2018
(In thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer lists	$	500,914	$	271,211	$	465,909	$	229,545
Purchased software	364,144		353,722		361,964		311,738
Internal use software	174,572		99,272		143,520		78,633
Trade names	41,731		26,574		40,025		21,275
Other	49,389		15,532		47,905		12,827
Total	$	1,130,750	$	766,311	$	1,059,323	$	654,018
Intangible assets, net			$	364,439			$	405,305

Amortization expense for 2019, 2018 and 2017 was $114 million, $109 million and $118 million, respectively.

Estimated aggregate amortization expense for each of the next five years is as follows:

(In thousands)
2020	$	79,434
2021	69,235
2022	63,892
2023	53,125
2024	46,180